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  • 1
    Electronic Resource
    Electronic Resource
    Statistical properties of two-dimensional magnetized plasmas
    Amsterdam : Elsevier
    Physica A: Statistical Mechanics and its Applications 153 (1988), S. 295-298 
    Details
    ISSN: 0378-4371
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-4371(88)90008-8
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  • 2
    Electronic Resource
    Electronic Resource
    Low-frequency nonlinear equations with inertial force term for toroidal plasmas
    Amsterdam : Elsevier
    Physics Letters A 141 (1989), S. 48-55 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(89)90443-X
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  • 3
    Electronic Resource
    Electronic Resource
    Two-dimensional coherent structures of drift waves exhibiting non-Boltzmann relationships in toroidal plasmas (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 381-384 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The two-dimensional mode equation describing drift waves that exhibit a non-Boltzmann relationship in a toroidal plasma is derived. Three types of solutions are obtained: (1) propagating cell patterns, in particular, triangular and hexagonal cell patterns, (2) a purely growing harmonic function, and (3), an isolated vortex propagating in the ion diamagnetic direction. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872720
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  • 4
    Electronic Resource
    Electronic Resource
    Sheared rotation effects, ion- and electron-temperature fluctuations, and generalized form factors on drift waves (1994)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 1 (1994), S. 3908-3914 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of inhomogeneous azimuthal flows in cylindrical geometry on drift waves with non-Boltzmann density response is investigated. Stabilization of dissipative drift waves by the inhomogeneous flow is also analyzed. Convective cells are shown to be destabilized by the discontinuous flow. Next, ion- and electron-temperature fluctuations in a resistive plasma are investigated in the slab approximation, allowing for the self-consistently stationary system parameters (electron- and ion-temperature inhomogeneities, magnetic shear, and plasma currents). Their magnitude, their propagation directions, and the dependence of their stability characteristics on the system parameters are identified, distinguishing between the weakly and the strongly collisional regions. Finally, the generalized form factor for density fluctuations in ion-temperature gradient modes is calculated. The resulting broad frequency spectrum is shown to stem from the fact that the linear growth rate is comparable to the real wave frequency. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.870863
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  • 5
    Electronic Resource
    Electronic Resource
    Unstable drift waves in a self-consistent stationary state with saturated magnetic shear (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 1507-1510 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The stability of dissipative drift wave eigenmodes in a stationary state is investigated. Small magnetic shear, generated self-consistently by an electron plasma current through Ampère's law, is included. This magnetic shear is found to be stabilizing (destabilizing) if the electron drift consistent with this is antiparallel (parallel) to the propagation direction of the drift waves. As a result, it is concluded that the introduction of magnetic shear does not effectively stabilize the drift wave instability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859475
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  • 6
    Electronic Resource
    Electronic Resource
    Nonlinear wave propagation in collisionless finite-beta inhomogeneous plasmas (1988)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 31 (1988), S. 2233-2237 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Four coupled nonlinear evolution equations for the electrostatic potential, the density fluctuation, and the two vector potentials are derived from the two-fluid and Maxwell's equations that describe low-frequency collisionless finite-beta inhomogeneous plasmas. Under the assumption of weak turbulence, the above equations reduce to the nonlinear Schrödinger equation. The technique adopted here is considered as an extension of the formal Karpman–Krushkal [Sov. Phys. JETP 28, 277 (1969)] method to a system of nonlinear partial differential equations. The general exact traveling wave solution to the nonlinear Schrödinger equation is obtained with the help of the Hamilton–Jacobi theory. This general solution may be regarded as describing a final nonlinear stage of the modulational instability. It is also shown that a solitary wave solution to the nonlinear Schrödinger equation, which corresponds to the limiting case of the general solution, is given by means of the simple iterative method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866625
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular cloning of yieldins regulating the yield threshold of cowpea cell walls: cDNA cloning and characterization of recombinant yieldin (2000)
    Oxford, UK : Blackwell Science Ltd
    Plant, cell & environment 23 (2000), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: cDNA for yieldin of Vigna unguiculata L. was cloned with reverse transcriptase-polymerase chain reaction using synthetic oligonucleotides as primers. The primers were designed on the basis of the N-terminal amino acid sequence of the yieldins isolated from the wall preparation of cowpea hypocotyls. The 1·2 kbp cDNA for yieldin contained an open reading frame of 981 base pairs, encoding 327 amino acids including 23 amino acids as a putative signal sequence. An homology search of the deduced amino acid sequence revealed that the yieldin was homologous to acidic class III endochitinases (EC 3·2.1·14) and concanavalin B. A cDNA fragment containing the yieldin-coding region was introduced to Escherichia coli cells using an expression vector to express the recombinant protein. The recombinant yieldin was obtained from the recombinant E. coli and its effect on the wall mechanical properties was examined by reconstitution experiments. The recombinant yieldin fully restored the acid-induced change of the yield threshold tension (y) of heat denatured glycerinated hollow cylinders (GHCs) of cowpea hypocotyls. Northern hybridization analysis revealed that the yieldin mRNA was expressed mainly in the rapid and moderate elongation region of the etiolated hypocotyl of Vigna unguiculata L.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.2000.00526.x
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  • 8
    Electronic Resource
    Electronic Resource
    The electrogenic proton pumping from parenchyma symplast into xylem—direct demonstration by xylem perfusion (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 8 (1985), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract We have devised an experimental system for simultaneous measurement of the activity of the xylem electrogenic ion pump, which is located on the inner cell membrane between the parenchyma symplast (p) and the xylem (x). and pH of the xylem exudate of a hypocotyl segment of Vigna unguiculata under pressurized xylem perfusion. Anoxia caused immediate depolarization of the inner cell membrane followed by alkalization of the xylem exudate several minutes later. Activity of the xylem pump was recovered by reaeration and acidification of the xylem exudate took place. These results indicate that the xylem pump is the respiration-dependent electrogenic proton-pump extruding proton from the parenchyma symplast into the xylem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1985.tb01688.x
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  • 9
    Electronic Resource
    Electronic Resource
    Measurement of β^+-activity by detecting 511 keV annihilation γ-rays
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 301 (1991), S. 594-595 
    Details
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-9002(91)90029-P
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  • 10
    Electronic Resource
    Electronic Resource
    The role of electrogenic xylem pumps in K+ absorption from the zylem of Vigna unguiculata: the effects of auxin and fusicoccin (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 8 (1985), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract We tested the hypothesis that electrogenic ion pumps, working at the parenchyma symplast/xylem interface of pea hypocotyls, provide the driving force for K+ uptake from the xylem. Solutions of known composition were perfused through a hypocotyl segment. The K+ activity of the solution flowing out of the xylem (K+out) increased (i.e. K+ uptake decreased) when aerobic respiration was inhibited by lack of O2, and this was preceded by a decrease in Vpx (electrical potential difference between parenchyma symplast and xylem). Perfusion with auxin (1AA) and fusicoccin (FC) stimulated the electrogenic activity of the ‘xylem pumps’ (111 and 205% respectively) and stimulated uptake of K + from the xylem (with 71% and 29% respectively). The close correlation between xylem pump activity and K+ uptake corroborated the aforementioned hypothesis. Interestingly, inhibition of pump activity by anoxia was incomplete in the presence of FC. It is thought that FC increases the affinity of the ATP-requiring xylem pump for ATP, thus ensuring that ATP production during fermentation is sufficient to fuel the pump in the absence of O2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1985.tb01696.x
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